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Date:      Thu, 25 Oct 2007 12:05:40 -0700
From:      LI Xin <delphij@delphij.net>
To:        Scott Long <scottl@samsco.org>
Cc:        Andrey Chernov <ache@nagual.pp.ru>, src-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-src@FreeBSD.ORG
Subject:   Re: cvs commit: src/lib/libc/locale utf8.c
Message-ID:  <4720E904.2090704@delphij.net>
In-Reply-To: <4720E0AF.1010004@samsco.org>
References:  <200710150951.l9F9pUm7026506@repoman.freebsd.org> <4720B30F.4040903@samsco.org> <20071025151707.GA11398@nagual.pp.ru> <4720E0AF.1010004@samsco.org>

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Scott Long wrote:
> Andrey Chernov wrote:
>> On Thu, Oct 25, 2007 at 09:15:27AM -0600, Scott Long wrote:
>>> Andrey A. Chernov wrote:
>>>> ache        2007-10-15 09:51:30 UTC
>>>>   FreeBSD src repository
>>>>   Modified files:
>>>>     lib/libc/locale      utf8.c   Log:
>>>>   Add comment explaining __mb_sb_limit trick here.
>>>>     Revision  Changes    Path
>>>>   1.16      +5 -0      src/lib/libc/locale/utf8.c
>>> When is the ABI damage from this going to be fixed?
>>
>> There is no ABI damage in -current.
>>
>=20
> Exposing the __mb_sb_limit symbol has instantly created a need
> to have a compat7x package, and is causing many users problems
> during upgrades and normal operations.  It may not be a problem
> for you, Andre, but it's a problem for everyone else.  Please
> respect this and fix it.

Well, I think the problem is not exposing a new symbol by itself, but
__mb_sb_limit is being used in _ctype.h, in a form of __inline
functions.  Therefore, the change will break new binaries running on
older systems.  Personally I think this is acceptable, but maybe we
could have a better way to avoid this, because the binaries are no
longer backward compatible (i.e. you may have trouble running a program
compiled for 6.3-RELEASE on 6.2-RELEASE, if it uses locale bits).

As a workaround as discussed with rafan@ we have installed a workaround
for now, which installs libc.so.6 before all other shared objects, which
will make the problem invisible.

Cheers,
--=20
Xin LI <delphij@delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!


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